18443733734481 has 32 divisors (see below), whose sum is σ = 28405709202816. Its totient is φ = 10520346624000.

The previous prime is 18443733734479. The next prime is 18443733734509.

18443733734481 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 18443733734481 - 2¹ = 18443733734479 is a prime.

It is a super-2 number, since 2×18443733734481² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18443733734401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51794161 + ... + 52149041.

It is an arithmetic number, because the mean of its divisors is an integer number (887678412588).

Almost surely, 2^{18443733734481} is an apocalyptic number.

18443733734481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18443733734481 is a deficient number, since it is larger than the sum of its proper divisors (9961975468335).

18443733734481 is a wasteful number, since it uses less digits than its factorization.

18443733734481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447553.

The product of its digits is 65028096, while the sum is 60.

The spelling of 18443733734481 in words is "eighteen trillion, four hundred forty-three billion, seven hundred thirty-three million, seven hundred thirty-four thousand, four hundred eighty-one".